Support different CNI plugin

[jichenjc]

/kind feature

Describe the solution you'd like
[A clear and concise description of what you want to happen.]

we use calico by default now , e.g the security group is set to calico now
as we envolve, support multiple CNI is reasonable way to move forward

at least, I am thinking about add
https://github.com/kubeovn/kube-ovn for now ...

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

[jichenjc]

/assign

[mkjpryor]

@jichenjc

Don't forget this flag that I added: https://github.com/kubernetes-sigs/cluster-api-provider-openstack/blob/main/api/v1alpha6/openstackcluster_types.go#L113

I added that so that I could use Cilium

[jichenjc]

ok, great ~ Thanks for the reminder~

[jichenjc]

the idea is to e.g make different set of rules so we can distinguish them and use that

infrav1.SecurityGroupRule{
                        Description:  "Kubernetes API",
                        Direction:    "ingress",
                        EtherType:    "IPv4",
                        PortRangeMin: 6443,
                        PortRangeMax: 6443,
                        Protocol:     "tcp",
                },

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/lifecycle stale

[jichenjc]

/remove-lifecycle stale

[jichenjc]

#1323 seems not best solution as it introduce configuration into code

the goal of this feature is to split the CNI settings from code to some configurations, either configmap or CRD (yaml)

• we need provide CNI settings in cluster definition

     -  CNI:  calico

if provided CNI is not recognizable, there is no no CNI setting at all ,it will be named all

• we create multiple pre-defined configmap (stored in json) for calico, clium (first) , the name has naming conventions like secgroup-cni-calico etc, for all, it's secgroup-cni-all means all traffic allowed
  like this example https://stackoverflow.com/questions/61653284/does-kubernetes-take-json-format-as-input-file-to-create-configmap-and-secret
• when start, the cluster read the setting and load the config then honor it and create sec group
• user is eligible to create additional security group and create config map like secgroup-cni-xxxx then it will be load during init process

to do item

• create a config map and use it to replace existing code with configmap for calico
• allow all traffic - all config map
• allow multiple secgroup-cni (like cilium)
• allow custom defined new CNI

[jichenjc]

@mdbooth can you help review above to see whether you have any comments? Thanks

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/lifecycle stale

[jichenjc]

/remove-lifecycle stale

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/lifecycle stale

[mdbooth]

/remove-lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough contributors to adequately respond to all issues.

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/lifecycle stale

[mdbooth]

/remove-lifecycle stale